Click on a site number for more information. How to access surface water quality monitoring data.
Arroyo Colorado Tidal Near CM 16 at Arroyo City, KM 10.9
Arroyo Colorado at Marker 27 (Mile 15) 0.5 Mile North of the Point Where Channel Becomes Boundary Between Willacy and Cameron Counties
Arroyo Colorado Tidal at Camp Perry North of Rio Hondo
Arroyo Colorado Tidal FM 106 Bridge at Rio Hondo
Arroyo Colorado at Low Water Bridge at Port Harlingen
Arroyo Colorado at U.S. 77 in Southwest Harlingen
Arroyo Colorado at Low Water Crossing at Dilworth Road, East of La Feria
Arroyo Colorado Main Floodway in Llano Grande at FM 1015 South of Weslaco
Arroyo Colorado at FM 493 South of Donna
Arroyo Colorado at US 281 South of Pharr
Arroyo Colorado at FM 336 South of McAllen